BRP-Rotax
Maintenance Manual
Effectivity 912/914 Series
Edition 1 / Rev. 0
72-00-00
page 21
May 01/2007
d02622
3.8)
Rev counter drive
See Figs. 72-17, 72-18 and 72-19.
The optional mechanical rev counter (1) is driven via the worm gear pressed into
the camshaft.
◆
NOTE:
On older engine versions without a mechanical rev counter, a
cover plate is fitted in place of the rev counter housing. The
engine can be retrofitted with a rev counter drive by installation
of the drive shaft. See Fig. 72-18.
◆
NOTE:
On new engine versions, the ignition cover must also be replaced
and the worm gear (9) pressed into the camshaft using special
tool, part no. 877190.
Remove allen screw M5x16 (2) and the lock washer, and pull the rev counter
housing (3) along with the O-ring (4) and the rev counter shaft (5) out of the
ignition housing (see 72-00-00 sec. 3.4).
Gear-tooth system (6) and square end (7) of the rev counter shaft must be
inspected for damage. If there is oil leakage, replace the shaft seal (8) 6x11x3
and O-ring (4). Press new shaft seal fully home in the rev counter housing (3)
using punch, part no. 877680
.
00241
1
4
6
Fig. 72-19
Fig. 72-18
00242
9
Fig. 72-17
00243
8
2
3
5
7
Summary of Contents for MMH-912 Series
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